Spark 2.8.3

Spark is an Open Source, cross-platform IM client optimized for businesses and
organizations. It features built-in support for group chat, telephony integration,
and strong security. It also offers a great end-user experience with features like
in-line spell checking, group chat room bookmarks, and tabbed conversations.

Combined with the Openfire server,
Spark is the easiest and best alternative to using un-secure public
IM networks.